/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.gaia.translation.utils;



import javax.annotation.Nonnull;

import java.io.Serializable;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.locks.Condition;

import java.util.concurrent.locks.Lock;



/**

 * A lock which can always be acquired. It should not be used when a proper lock is required, but it

 * is useful as a performance optimization when locking is not necessary but the code paths have to

 * be shared between the locking and the non-locking variant.

 */

public class NoopLock implements Lock, Serializable {



  private static NoopLock instance;



  public static NoopLock get() {

    if (instance == null) {

      instance = new NoopLock();

    }

    return instance;

  }



  private NoopLock() {}



  @Override

  public void lock() {}



  @Override

  public void lockInterruptibly() {}



  @Override

  public boolean tryLock() {

    return true;

  }



  @Override

  public boolean tryLock(long time, @Nonnull TimeUnit unit) {

    return true;

  }



  @Override

  public void unlock() {}



  @Nonnull

  @Override

  public Condition newCondition() {

    throw new UnsupportedOperationException("Not implemented");

  }

}